-->if I bet on a Yahtzee next round and get it, it'd be 50 next round plus the 6 I'd bank this round, so +56-->if I bet on 4 sixes next round and get it, it'd be 0 this round but at least 26+35 next round, so +61.

I'm guessing the probability of a Yahtzee is > probability of 4 sixes. But Yahtzee is all or nothing. With 4 sixes, a fail could still yield lesser points.

@EK - You have to take the 0 on the Yahtzee now and hope to get 5 sixes next round while the readers roll none. In that scenario you win by 4, 245 - 241. There is no other scenario that I can see where the Sons can win this thing (except for the readers royally screwing up the vote on the small straight this round).